The 1955 Lincoln Futura concept car hides in plain sight in an automotive museum - it was turned into the Batmobile for the "Batman" TV series.

See the whole article on Hagerty's website http://www.hagerty.com/classic-car-articles-resources/Features/News/All-Articles/2012/05/24/Legendary-Lost-Cars?utm_source=ExactTarget&utm_medium=email&utm_term=&utm_content=